Psalidodon rivularis (Luetken, 1875)

Fig. 3O

Distribution.

Rio São Francisco basin, Southeastern Brazil.

Diagnosis.

Psalidodon rivularis differs from its congeners of the study area by having premaxilla aligned with dentary in lateral view; four or five wide teeth in the inner series of premaxilla (if present, the fifth tooth is too small or not aligned with others); chromatophores surrounding abdominal scales and in higher concentration on the base of scales; developed scales in pectoral, pelvic, and anal fins.

Remarks.

Psalidodon rivularis was originally described as an endemic species from the rio São Francisco basin. However, in the present study it was found in the rio Doce basin, confirming record of the species in this basin. Oliveira (2017) also confirmed the occurrence of P. rivularis as such as from the headwaters of rio Doce plus the headwaters of rio Jequitinhonha basin, while suggesting the synonymy of Astyanax turmalinensis (Triques, 2003) with Psalidodon rivularis .